A SINGLE-INPUT SINGLE-CHAIN DUAL-BAND POWER AMPLIFIER FOR CDMA MOBILE APPLICATION

摘要

We demonstrate a new structure of the single-input single-chain power amplifier for cellular (850 MHz)/PCS (1750 MHz) dual-band operation, The single-input structure seems adequate for the reconfigurable multiband transmitter and the single-chain structure can achieve a small chip and module size, thus reducing manufacturing costs. This two-stage amplifier has a maximum output power of 30 dBm (29 dBm), a power-added efficiency (PAE) of 42% (37%), and an adjacent channel power ratio (ACPR) of -51 dBc (-48 dBc) at the output power of 28 dBm (28 dBm) under 3,4-V operation voltage for cellular (PCS) band.